Decision Workspace
card-est-array vs cardinality-estimator vs enum-iterator
Side-by-side comparison of Rust crates
58
card-est-array
experimentalv0.6.0
Infrastructure for managing large arrays of cardinality estimators.
64
cardinality-estimator
stablev1.0.3
A crate for estimating the cardinality of distinct elements in a stream or dataset.
63
enum-iterator
growingv2.3.0
Tools to iterate over all values of a type (e.g. all variants of an enumeration)
Core Metrics
| card-est-array | cardinality-estimator | enum-iterator | |
|---|---|---|---|
| Health Score | 58 | 64 | 63 |
| Total Downloads | 11.0K | 914.6K | 40.4M |
| 30d Downloads | 1.6K | 87.1K | 2.1M |
| Dependents | 10 | 48 | 4.2K |
| Releases | 8 | 4 | 26 |
| Last Updated | 6d ago | 45d ago | 200d ago |
| Age | 11m | 1y 10m | 7y 9m |
Health Breakdown
card-est-array
Maintenance
19
Quality
14
Community
8
Popularity
5
Documentation
12
cardinality-estimator
Maintenance
13
Quality
18
Community
13
Popularity
7
Documentation
13
enum-iterator
Maintenance
10
Quality
20
Community
12
Popularity
8
Documentation
13
Technical Details
| card-est-array | cardinality-estimator | enum-iterator | |
|---|---|---|---|
| Version | 0.6.0 | 1.0.3 | 2.3.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | Apache-2.0 OR LGPL-2.1-or-later | Apache-2.0 | 0BSD |
| Dependencies | 4 | 14 | 1 |
| Crate Size | 42KB | 434KB | 8KB |
| Features | 1 | 2 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2021 | 2021 |
| MSRV | 1.85 | — | — |
| Owners | 1 | 2 | 1 |
Links
Quick Verdict
- •cardinality-estimator leads with a health score of 64/100, but none of the options score above 80.
- •enum-iterator has the most downloads (40.4M), suggesting wider adoption.
- •enum-iterator is depended on by 4.2K crates — strongest ecosystem trust.
- •card-est-array is pre-1.0 — API may change.